Dark Knight Rises star Anne Hathway has said she is struggling with her extreme diet and exercise plan for her Catwoman Role.

The actress, who will be portraying the role of Selina Kyle in Christopher Nolan's third Batman installment admitted she was finding hard to cope with the diet she was given for the part.

During an interview on Chelsea Lately, the actress said: "I'm a vegetarian and right now, I'm living on kale and dust for the training. That catsuit's unforgiving."

Hathaway explained she was still getting used to the daily strenuous fitness routine: "I've never really gotten over the hump, There's a workout hump where you're so weak that you hate everything, everything is so painful and you look like an idiot."

"The gym where I work out, I was literally working out next to a pregnant Jessica Alba and she could do more push-ups than I could. I just started to do Bikram yoga."

The Dark Knight Rises will be the final installment in the Batman franchise and will see Christian Bale reprise his role as superhero Bruce Wayne. Other cast members will include Michael Caine, Gary Oldman, Morgan Freeman, Joseph Gordon-Levitt, Marion Cotillard and Tom Hardy as villain Bane.

The actress will next be seen on screen alongside Jim Sturgess in Lone Scherfig's One Day.